Leto, 45, is currently single, but not opposed to settling down … or to just having a tyke show up someday.

“You never know,” he said about getting married someday. “You may get the knock on the door that says, ‘Hey Jared, surprise! Guess what?’ and that could be fun too.”

He previously told Rolling Stone, “Someone could always come up to a show and give me a little surprise visit. ‘Dad?’ In a way, that would be kind of f—–g beautiful. What an incredible surprise that would be!”